Please attach the invoice PDF to the 1st of the month email notification. Or make it a settings options for users to have this. It would just make accounts filing easier as I'd have a copy of the invoice without having to log in to my account and download each an every invoice. Cheers!
Thank you for voicing your support for PDF invoices! We're happy to announce that starting on 1 January, 2019, you will now be receiving PDF invoices attached to your monthly billing emails.
You can keep track of this and other current and upcoming changes in our release notes: https://www.digitalocean.com/docs/platform/release-notes/
All of us at DigitalOcean wish you a happy new year!